The effective incident rays entered the eye from different parts of the reflection disc according to their incident angles.
有效投射光线依照其投射角，由光斑的不同部位进入眼中。
Fresnel's plate can focus incident rays producing very strong brightness the function of which resembles lens forming images.
菲涅耳波带片可使入射光会聚起来，产生极大的光强，使点光源形成一系列的实像点和虚像点，其作用如同透镜成像。
That, in turn, affects how the crests and troughs of the incident and reflected rays fall on each other.
反过来又影响了彼此的反射光和入射光的波峰和波谷下降。
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